Improvement in mortise-locks for sliding doors



UNITED STATES PATENT OFFICE.

BURTON MALLORY, OF NEW HAVEN, CONNECTICUT.

IMPROVEMENT IN MORTISE-LOCKS FOR SLIDING DOORS.

Specification forming part of Letters Patent No. 164 ,572, dated June 15, 1875; application tiled June 2, 1875.

To all whom lit may concern:

Be it known that I, BURTON MALLoRY, of New Haven, in the county of New Haven and State of Connecticut,.have invented a new Improvement in Lock or Pull for Sliding Doors; and I do hereby declare the following, when taken in connection with the accompanying drawings and the letters of reference marked thereon, to be a full, clear and exact description ofthe same, and which said drawings constitute part of this specification, and represent in- Figure I face view of a lock; Fig. 2, au interior view of the lock, showing` the improve' ment; Fig. 3, an independent pull embodying the improvement.

This invention relates to an improvement in the lock for sliding doors, for which Letters Patent were granted to me dated November 3, 187 4, No. 156,582.

In that patent the improvement consisted in an opening through the face-place into a chamber or case, so that by inserting the 1inger into said chamber through the opening, a convenient means was att'orded by which to slide the door. In that construction no provision was made to close the opening when not'in use.

In some cases this is objectionable, and the object of this invention is to overcome this objection; and it consists in combining with the face-plate, a self-closing ap, as more fully hereinafter described.

A is the face-plate of a sliding door-lock, the lock mechanism being substantially the usual construction, and no part of this invention needs any further description. B is the recess formed in the case, to which an opening is made through the face-plate, as in my said patent.

This opening is filled by a flap, C, hinged to the face-plate, or other convenient point, so as to be easily turned inward by pressing the finger against it, as seen in Fig. 3. I prefer to hinge this iap at the lower end, as shown,

as being less liable to interfere with the n ger, but it may be hung above, and it is preferably provided with a spring to force it into its closed position. It', however, it be hun g above, its own gravity may serve to close it.

This is applicable alike to the lock, its keeper, or to an independent pull, as seen in Fig. 3, the essential feature ot' the invention being a self-closing tia-p for the opening in the face-plate.

I claim- In combination with the face-plate of a lock or pull for sliding doors, constructed with a iinger opening and recess in rear of said plate, a self-closing iiap for said opening, substantiall y 'a's described.

BURTON MALLORY. 

